git.sesse.net Git - mlt/blob - src/modules/westley/consumer_westley.c

   1 /*
   2  * consumer_westley.c -- a libxml2 serialiser of mlt service networks
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "consumer_westley.h"
  22 #include <framework/mlt.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <pthread.h>
  27 #include <unistd.h>
  28 #include <libxml/tree.h>
  29
  30 #define ID_SIZE 128
  31
  32 // This maintains counters for adding ids to elements
  33 struct serialise_context_s
  34 {
  35         mlt_properties id_map;
  36         int producer_count;
  37         int multitrack_count;
  38         int playlist_count;
  39         int tractor_count;
  40         int filter_count;
  41         int transition_count;
  42         int pass;
  43         mlt_properties hide_map;
  44         char *root;
  45 };
  46 typedef struct serialise_context_s* serialise_context;
  47
  48 /** Forward references to static functions.
  49 */
  50
  51 static int consumer_start( mlt_consumer parent );
  52 static int consumer_is_stopped( mlt_consumer this );
  53 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node );
  54
  55 typedef enum
  56 {
  57         westley_existing,
  58         westley_producer,
  59         westley_multitrack,
  60         westley_playlist,
  61         westley_tractor,
  62         westley_filter,
  63         westley_transition
  64 }
  65 westley_type;
  66
  67 /** Create or retrieve an id associated to this service.
  68 */
  69
  70 static char *westley_get_id( serialise_context context, mlt_service service, westley_type type )
  71 {
  72         char *id = NULL;
  73         int i = 0;
  74         mlt_properties map = context->id_map;
  75
  76         // Search the map for the service
  77         for ( i = 0; i < mlt_properties_count( map ); i ++ )
  78                 if ( mlt_properties_get_data_at( map, i, NULL ) == service )
  79                         break;
  80
  81         // If the service is not in the map, and the type indicates a new id is needed...
  82         if ( i >= mlt_properties_count( map ) && type != westley_existing )
  83         {
  84                 // Attempt to reuse existing id
  85                 id = mlt_properties_get( mlt_service_properties( service ), "id" );
  86
  87                 // If no id, or the id is used in the map (for another service), then
  88                 // create a new one.
  89                 if ( id == NULL || mlt_properties_get_data( map, id, NULL ) != NULL )
  90                 {
  91                         char temp[ ID_SIZE ];
  92                         do
  93                         {
  94                                 switch( type )
  95                                 {
  96                                         case westley_producer:
  97                                                 sprintf( temp, "producer%d", context->producer_count ++ );
  98                                                 break;
  99                                         case westley_multitrack:
 100                                                 sprintf( temp, "multitrack%d", context->multitrack_count ++ );
 101                                                 break;
 102                                         case westley_playlist:
 103                                                 sprintf( temp, "playlist%d", context->playlist_count ++ );
 104                                                 break;
 105                                         case westley_tractor:
 106                                                 sprintf( temp, "tractor%d", context->tractor_count ++ );
 107                                                 break;
 108                                         case westley_filter:
 109                                                 sprintf( temp, "filter%d", context->filter_count ++ );
 110                                                 break;
 111                                         case westley_transition:
 112                                                 sprintf( temp, "transition%d", context->transition_count ++ );
 113                                                 break;
 114                                         case westley_existing:
 115                                                 // Never gets here
 116                                                 break;
 117                                 }
 118                         }
 119                         while( mlt_properties_get_data( map, temp, NULL ) != NULL );
 120
 121                         // Set the data at the generated name
 122                         mlt_properties_set_data( map, temp, service, 0, NULL, NULL );
 123
 124                         // Get the pointer to the name (i is the end of the list)
 125                         id = mlt_properties_get_name( map, i );
 126                 }
 127                 else
 128                 {
 129                         // Store the existing id in the map
 130                         mlt_properties_set_data( map, id, service, 0, NULL, NULL );
 131                 }
 132         }
 133         else if ( type == westley_existing )
 134         {
 135                 id = mlt_properties_get_name( map, i );
 136         }
 137
 138         return id;
 139 }
 140
 141 /** This is what will be called by the factory - anything can be passed in
 142         via the argument, but keep it simple.
 143 */
 144
 145 mlt_consumer consumer_westley_init( char *arg )
 146 {
 147         // Create the consumer object
 148         mlt_consumer this = calloc( sizeof( struct mlt_consumer_s ), 1 );
 149
 150         // If no malloc'd and consumer init ok
 151         if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
 152         {
 153                 // Allow thread to be started/stopped
 154                 this->start = consumer_start;
 155                 this->is_stopped = consumer_is_stopped;
 156
 157                 mlt_properties_set( mlt_consumer_properties( this ), "resource", arg );
 158
 159                 // Return the consumer produced
 160                 return this;
 161         }
 162
 163         // malloc or consumer init failed
 164         free( this );
 165
 166         // Indicate failure
 167         return NULL;
 168 }
 169
 170 static inline void serialise_properties( serialise_context context, mlt_properties properties, xmlNode *node )
 171 {
 172         int i;
 173         xmlNode *p;
 174
 175         // Enumerate the properties
 176         for ( i = 0; i < mlt_properties_count( properties ); i++ )
 177         {
 178                 char *name = mlt_properties_get_name( properties, i );
 179                 if ( name != NULL &&
 180                          name[ 0 ] != '_' &&
 181                          mlt_properties_get_value( properties, i ) != NULL &&
 182                          strcmp( name, "westley" ) != 0 &&
 183                          strcmp( name, "in" ) != 0 &&
 184                          strcmp( name, "out" ) != 0 &&
 185                          strcmp( name, "id" ) != 0 &&
 186                          strcmp( name, "root" ) != 0 &&
 187                          strcmp( name, "width" ) != 0 &&
 188                          strcmp( name, "height" ) != 0 )
 189                 {
 190                         char *value = mlt_properties_get_value( properties, i );
 191                         p = xmlNewChild( node, NULL, "property", NULL );
 192                         xmlNewProp( p, "name", mlt_properties_get_name( properties, i ) );
 193                         if ( strcmp( context->root, "" ) && !strncmp( value, context->root, strlen( context->root ) ) )
 194                                 xmlNodeSetContent( p, value + strlen( context->root ) + 1 );
 195                         else
 196                                 xmlNodeSetContent( p, value );
 197                 }
 198         }
 199 }
 200
 201 static inline void serialise_service_filters( serialise_context context, mlt_service service, xmlNode *node )
 202 {
 203         int i;
 204         xmlNode *p;
 205         mlt_filter filter = NULL;
 206
 207         // Enumerate the filters
 208         for ( i = 0; ( filter = mlt_producer_filter( MLT_PRODUCER( service ), i ) ) != NULL; i ++ )
 209         {
 210                 mlt_properties properties = mlt_filter_properties( filter );
 211                 if ( mlt_properties_get_int( properties, "_fezzik" ) == 0 )
 212                 {
 213                         // Get a new id - if already allocated, do nothing
 214                         char *id = westley_get_id( context, mlt_filter_service( filter ), westley_filter );
 215                         if ( id != NULL )
 216                         {
 217                                 int in = mlt_properties_get_position( properties, "in" );
 218                                 int out = mlt_properties_get_position( properties, "out" );
 219                                 p = xmlNewChild( node, NULL, "filter", NULL );
 220                                 xmlNewProp( p, "id", id );
 221                                 if ( in != 0 || out != 0 )
 222                                 {
 223                                         char temp[ 20 ];
 224                                         sprintf( temp, "%d", in );
 225                                         xmlNewProp( p, "in", temp );
 226                                         sprintf( temp, "%d", out );
 227                                         xmlNewProp( p, "out", temp );
 228                                 }
 229                                 serialise_properties( context, properties, p );
 230                                 serialise_service_filters( context, mlt_filter_service( filter ), p );
 231                         }
 232                 }
 233         }
 234 }
 235
 236 static void serialise_producer( serialise_context context, mlt_service service, xmlNode *node )
 237 {
 238         xmlNode *child = node;
 239         mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( MLT_PRODUCER( service ) ) );
 240
 241         if ( context->pass == 0 )
 242         {
 243                 mlt_properties properties = mlt_service_properties( parent );
 244                 // Get a new id - if already allocated, do nothing
 245                 char *id = westley_get_id( context, parent, westley_producer );
 246                 if ( id == NULL )
 247                         return;
 248
 249                 child = xmlNewChild( node, NULL, "producer", NULL );
 250
 251                 // Set the id
 252                 xmlNewProp( child, "id", id );
 253                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 254                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 255                 serialise_properties( context, properties, child );
 256                 serialise_service_filters( context, service, child );
 257
 258                 // Add producer to the map
 259                 mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
 260         }
 261         else
 262         {
 263                 char *id = westley_get_id( context, parent, westley_existing );
 264                 mlt_properties properties = mlt_service_properties( service );
 265                 xmlNewProp( node, "parent", id );
 266                 xmlNewProp( node, "in", mlt_properties_get( properties, "in" ) );
 267                 xmlNewProp( node, "out", mlt_properties_get( properties, "out" ) );
 268         }
 269 }
 270
 271 static void serialise_multitrack( serialise_context context, mlt_service service, xmlNode *node )
 272 {
 273         int i;
 274
 275         if ( context->pass == 0 )
 276         {
 277                 // Iterate over the tracks to collect the producers
 278                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 279                         serialise_service( context, MLT_SERVICE( mlt_multitrack_track( MLT_MULTITRACK( service ), i ) ), node );
 280         }
 281         else
 282         {
 283                 // Get a new id - if already allocated, do nothing
 284                 char *id = westley_get_id( context, service, westley_multitrack );
 285                 if ( id == NULL )
 286                         return;
 287
 288                 // Serialise the tracks
 289                 for ( i = 0; i < mlt_multitrack_count( MLT_MULTITRACK( service ) ); i++ )
 290                 {
 291                         xmlNode *track = xmlNewChild( node, NULL, "track", NULL );
 292                         int hide = 0;
 293                         mlt_producer producer = mlt_multitrack_track( MLT_MULTITRACK( service ), i );
 294                         mlt_properties properties = mlt_producer_properties( producer );
 295
 296                         mlt_service parent = MLT_SERVICE( mlt_producer_cut_parent( producer ) );
 297
 298                         char *id = westley_get_id( context, MLT_SERVICE( parent ), westley_existing );
 299                         xmlNewProp( track, "producer", id );
 300                         xmlNewProp( track, "in", mlt_properties_get( properties, "in" ) );
 301                         xmlNewProp( track, "out", mlt_properties_get( properties, "out" ) );
 302
 303                         hide = mlt_properties_get_int( context->hide_map, id );
 304                         if ( hide )
 305                                 xmlNewProp( track, "hide", hide == 1 ? "video" : ( hide == 2 ? "audio" : "both" ) );
 306                 }
 307                 serialise_service_filters( context, service, node );
 308         }
 309 }
 310
 311 static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node );
 312
 313 static void serialise_playlist( serialise_context context, mlt_service service, xmlNode *node )
 314 {
 315         int i;
 316         xmlNode *child = node;
 317         mlt_playlist_clip_info info;
 318         mlt_properties properties = mlt_service_properties( service );
 319
 320         if ( context->pass == 0 )
 321         {
 322                 // Get a new id - if already allocated, do nothing
 323                 char *id = westley_get_id( context, service, westley_playlist );
 324                 if ( id == NULL )
 325                         return;
 326
 327                 // Iterate over the playlist entries to collect the producers
 328                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 329                 {
 330                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 331                         {
 332                                 if ( info.producer != NULL )
 333                                 {
 334                                         mlt_producer producer = mlt_producer_cut_parent( info.producer );
 335                                         char *service_s = mlt_properties_get( mlt_producer_properties( producer ), "mlt_service" );
 336                                         char *resource_s = mlt_properties_get( mlt_producer_properties( producer ), "resource" );
 337                                         if ( resource_s != NULL && !strcmp( resource_s, "<tractor>" ) )
 338                                         {
 339                                                 serialise_tractor( context, MLT_SERVICE( producer ), node );
 340                                                 context->pass ++;
 341                                                 serialise_tractor( context, MLT_SERVICE( producer ), node );
 342                                                 context->pass --;
 343                                         }
 344                                         else if ( service_s != NULL && strcmp( service_s, "blank" ) != 0 )
 345                                                 serialise_service( context, MLT_SERVICE( producer ), node );
 346                                         else if ( resource_s != NULL && !strcmp( resource_s, "<playlist>" ) )
 347                                                 serialise_playlist( context, MLT_SERVICE( producer ), node );
 348                                 }
 349                         }
 350                 }
 351
 352                 child = xmlNewChild( node, NULL, "playlist", NULL );
 353
 354                 // Set the id
 355                 xmlNewProp( child, "id", id );
 356
 357                 // Add producer to the map
 358                 mlt_properties_set_int( context->hide_map, id, mlt_properties_get_int( properties, "hide" ) );
 359
 360                 // Iterate over the playlist entries
 361                 for ( i = 0; i < mlt_playlist_count( MLT_PLAYLIST( service ) ); i++ )
 362                 {
 363                         if ( ! mlt_playlist_get_clip_info( MLT_PLAYLIST( service ), &info, i ) )
 364                         {
 365                                 mlt_producer producer = mlt_producer_cut_parent( info.producer );
 366                                 char *service_s = mlt_properties_get( mlt_producer_properties( producer ), "mlt_service" );
 367                                 if ( service_s != NULL && strcmp( service_s, "blank" ) == 0 )
 368                                 {
 369                                         char length[ 20 ];
 370                                         length[ 19 ] = '\0';
 371                                         xmlNode *entry = xmlNewChild( child, NULL, "blank", NULL );
 372                                         snprintf( length, 19, "%d", info.frame_count );
 373                                         xmlNewProp( entry, "length", length );
 374                                 }
 375                                 else
 376                                 {
 377                                         char temp[ 20 ];
 378                                         xmlNode *entry = xmlNewChild( child, NULL, "entry", NULL );
 379                                         id = westley_get_id( context, MLT_SERVICE( producer ), westley_existing );
 380                                         xmlNewProp( entry, "producer", id );
 381                                         sprintf( temp, "%d", info.frame_in );
 382                                         xmlNewProp( entry, "in", temp );
 383                                         sprintf( temp, "%d", info.frame_out );
 384                                         xmlNewProp( entry, "out", temp );
 385                                         if ( mlt_producer_is_cut( info.producer ) )
 386                                                 serialise_service_filters( context, mlt_producer_service( info.producer ), entry );
 387                                 }
 388                         }
 389                 }
 390
 391                 serialise_service_filters( context, service, child );
 392         }
 393         else if ( strcmp( (const char*) node->name, "tractor" ) != 0 )
 394         {
 395                 char *id = westley_get_id( context, service, westley_existing );
 396                 xmlNewProp( node, "producer", id );
 397         }
 398 }
 399
 400 static void serialise_tractor( serialise_context context, mlt_service service, xmlNode *node )
 401 {
 402         xmlNode *child = node;
 403         mlt_properties properties = mlt_service_properties( service );
 404
 405         if ( context->pass == 0 )
 406         {
 407                 // Recurse on connected producer
 408                 serialise_service( context, mlt_service_producer( service ), node );
 409         }
 410         else
 411         {
 412                 // Get a new id - if already allocated, do nothing
 413                 char *id = westley_get_id( context, service, westley_tractor );
 414                 if ( id == NULL )
 415                         return;
 416
 417                 child = xmlNewChild( node, NULL, "tractor", NULL );
 418
 419                 // Set the id
 420                 xmlNewProp( child, "id", id );
 421                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 422                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 423
 424                 // Recurse on connected producer
 425                 serialise_service( context, mlt_service_producer( service ), child );
 426                 serialise_service_filters( context, service, child );
 427         }
 428 }
 429
 430 static void serialise_filter( serialise_context context, mlt_service service, xmlNode *node )
 431 {
 432         xmlNode *child = node;
 433         mlt_properties properties = mlt_service_properties( service );
 434
 435         // Recurse on connected producer
 436         serialise_service( context, mlt_service_producer( service ), node );
 437
 438         if ( context->pass == 1 )
 439         {
 440                 // Get a new id - if already allocated, do nothing
 441                 char *id = westley_get_id( context, service, westley_filter );
 442                 if ( id == NULL )
 443                         return;
 444
 445                 child = xmlNewChild( node, NULL, "filter", NULL );
 446
 447                 // Set the id
 448                 xmlNewProp( child, "id", id );
 449                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 450                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 451
 452                 serialise_properties( context, properties, child );
 453                 serialise_service_filters( context, service, child );
 454         }
 455 }
 456
 457 static void serialise_transition( serialise_context context, mlt_service service, xmlNode *node )
 458 {
 459         xmlNode *child = node;
 460         mlt_properties properties = mlt_service_properties( service );
 461
 462         // Recurse on connected producer
 463         serialise_service( context, MLT_SERVICE( MLT_TRANSITION( service )->producer ), node );
 464
 465         if ( context->pass == 1 )
 466         {
 467                 // Get a new id - if already allocated, do nothing
 468                 char *id = westley_get_id( context, service, westley_transition );
 469                 if ( id == NULL )
 470                         return;
 471
 472                 child = xmlNewChild( node, NULL, "transition", NULL );
 473
 474                 // Set the id
 475                 xmlNewProp( child, "id", id );
 476                 xmlNewProp( child, "in", mlt_properties_get( properties, "in" ) );
 477                 xmlNewProp( child, "out", mlt_properties_get( properties, "out" ) );
 478
 479                 serialise_properties( context, properties, child );
 480                 serialise_service_filters( context, service, child );
 481         }
 482 }
 483
 484 static void serialise_service( serialise_context context, mlt_service service, xmlNode *node )
 485 {
 486         // Iterate over consumer/producer connections
 487         while ( service != NULL )
 488         {
 489                 mlt_properties properties = mlt_service_properties( service );
 490                 char *mlt_type = mlt_properties_get( properties, "mlt_type" );
 491
 492                 // Tell about the producer
 493                 if ( strcmp( mlt_type, "producer" ) == 0 )
 494                 {
 495                         serialise_producer( context, service, node );
 496                         if ( mlt_properties_get( properties, "westley" ) != NULL )
 497                                 break;
 498                 }
 499
 500                 // Tell about the framework container producers
 501                 else if ( strcmp( mlt_type, "mlt_producer" ) == 0 )
 502                 {
 503                         char *resource = mlt_properties_get( properties, "resource" );
 504
 505                         // Recurse on multitrack's tracks
 506                         if ( strcmp( resource, "<multitrack>" ) == 0 )
 507                         {
 508                                 serialise_multitrack( context, service, node );
 509                                 break;
 510                         }
 511
 512                         // Recurse on playlist's clips
 513                         else if ( strcmp( resource, "<playlist>" ) == 0 )
 514                         {
 515                                 serialise_playlist( context, service, node );
 516                         }
 517
 518                         // Recurse on tractor's producer
 519                         else if ( strcmp( resource, "<tractor>" ) == 0 )
 520                         {
 521                                 serialise_tractor( context, service, node );
 522                                 break;
 523                         }
 524
 525                         // Treat it as a normal producer
 526                         else
 527                         {
 528                                 serialise_producer( context, service, node );
 529                         }
 530                 }
 531
 532                 // Tell about a filter
 533                 else if ( strcmp( mlt_type, "filter" ) == 0 )
 534                 {
 535                         serialise_filter( context, service, node );
 536                         break;
 537                 }
 538
 539                 // Tell about a transition
 540                 else if ( strcmp( mlt_type, "transition" ) == 0 )
 541                 {
 542                         serialise_transition( context, service, node );
 543                         break;
 544                 }
 545
 546                 // Get the next connected service
 547                 service = mlt_service_producer( service );
 548         }
 549 }
 550
 551 xmlDocPtr westley_make_doc( mlt_service service )
 552 {
 553         mlt_properties properties = mlt_service_properties( service );
 554         xmlDocPtr doc = xmlNewDoc( "1.0" );
 555         xmlNodePtr root = xmlNewNode( NULL, "westley" );
 556         struct serialise_context_s *context = calloc( 1, sizeof( struct serialise_context_s ) );
 557
 558         xmlDocSetRootElement( doc, root );
 559
 560         // If we have root, then deal with it now
 561         if ( mlt_properties_get( properties, "root" ) != NULL )
 562         {
 563                 xmlNewProp( root, "root", mlt_properties_get( properties, "root" ) );
 564                 context->root = strdup( mlt_properties_get( properties, "root" ) );
 565         }
 566         else
 567         {
 568                 context->root = strdup( "" );
 569         }
 570
 571         // Assign a title property
 572         if ( mlt_properties_get( properties, "title" ) != NULL )
 573                 xmlNewProp( root, "title", mlt_properties_get( properties, "title" ) );
 574
 575         // Construct the context maps
 576         context->id_map = mlt_properties_new();
 577         context->hide_map = mlt_properties_new();
 578
 579         // Ensure producer is a framework producer
 580         mlt_properties_set( mlt_service_properties( service ), "mlt_type", "mlt_producer" );
 581
 582         // In pass one, we serialise the end producers and playlists,
 583         // adding them to a map keyed by address.
 584         serialise_service( context, service, root );
 585
 586         // In pass two, we serialise the tractor and reference the
 587         // producers and playlists
 588         context->pass++;
 589         serialise_service( context, service, root );
 590
 591         // Cleanup resource
 592         mlt_properties_close( context->id_map );
 593         mlt_properties_close( context->hide_map );
 594         free( context->root );
 595         free( context );
 596
 597         return doc;
 598 }
 599
 600 static int consumer_start( mlt_consumer this )
 601 {
 602         xmlDocPtr doc = NULL;
 603
 604         // Get the producer service
 605         mlt_service service = mlt_service_producer( mlt_consumer_service( this ) );
 606         if ( service != NULL )
 607         {
 608                 mlt_properties properties = mlt_consumer_properties( this );
 609                 char *resource =  mlt_properties_get( properties, "resource" );
 610
 611                 // Set the title if provided
 612                 if ( mlt_properties_get( properties, "title" ) )
 613                         mlt_properties_set( mlt_service_properties( service ), "title", mlt_properties_get( properties, "title" ) );
 614                 else if ( mlt_properties_get( mlt_service_properties( service ), "title" ) == NULL )
 615                         mlt_properties_set( mlt_service_properties( service ), "title", "Anonymous Submission" );
 616
 617                 // Check for a root on the consumer properties and pass to service
 618                 if ( mlt_properties_get( properties, "root" ) )
 619                         mlt_properties_set( mlt_service_properties( service ), "root", mlt_properties_get( properties, "root" ) );
 620
 621                 // Specify roots in other cases...
 622                 if ( resource != NULL && mlt_properties_get( properties, "root" ) == NULL )
 623                 {
 624                         // Get the current working directory
 625                         char *cwd = getcwd( NULL, 0 );
 626                         mlt_properties_set( mlt_service_properties( service ), "root", cwd );
 627                         free( cwd );
 628                 }
 629
 630                 // Make the document
 631                 doc = westley_make_doc( service );
 632
 633                 // Handle the output
 634                 if ( resource == NULL || !strcmp( resource, "" ) )
 635                 {
 636                         xmlDocFormatDump( stdout, doc, 1 );
 637                 }
 638                 else if ( !strcmp( resource, "buffer" ) )
 639                 {
 640                         xmlChar *buffer = NULL;
 641                         int length = 0;
 642                         xmlDocDumpMemory( doc, &buffer, &length );
 643                         mlt_properties_set_data( properties, "buffer", buffer, length, xmlFree, NULL );
 644                 }
 645                 else
 646                 {
 647                         xmlSaveFormatFile( resource, doc, 1 );
 648                 }
 649
 650                 // Close the document
 651                 xmlFreeDoc( doc );
 652         }
 653
 654         mlt_consumer_stop( this );
 655
 656         mlt_consumer_stopped( this );
 657
 658         return 0;
 659 }
 660
 661 static int consumer_is_stopped( mlt_consumer this )
 662 {
 663         return 1;
 664 }